Packing-ring.



M. Ef KNIGHT., )PACKING RING. APPLICATION FILED JUN G, 1912 LOW-86,299'. Patented Feb.3,1914.

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MARGARET E. KNIGHT, OF SOUTH FRAMINGHAM, MASSACHUSETTS, ASSIGNOR, 'BY DIRECT AND MESNE ASSIGNMENTS, TO K-D MOTOR COMPANY, A. CORPORATION 0F NEW YORK.

PACKING-RING.

To 'all whom it may concern Be it known that I, haiieaniirl E. KNIGHT, a citizen of the United States, residing in South Framingham, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Packing-Rings, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawf ings representing like parts.

The present invention relates to a packing ring, and is embodied in a ring adapted to pack the space around lateral ports in a cylinder between the said cylinder and a cylindrical slide valveor valves in an engine in which the slide valve or valves are` concentric with the cylinder, while the ports are controlled by a movementof one part relatively to the other.

It is the purpose of the invention to arrange the packing so that the expanded portions thereof will completely surround the ports, and, in accordance with the invention, the ring is made of several parts, whereby it is easily assembled as a whole, while the separate parts are 'so arranged as to break joints7 so that there is an unbroken packing at every point where leakage might occur.

In the construction shown to illustrate the invention the cylinder is stationary, while the valves consist of longitudinally movable slides fitting the outside of the cylinder and having ports which correspond to ports cut through the cylinder wall at the opposite sides thereof.-y To contain the packing ring, the cylinder is provided with two annular recesses at opposite sides of the port, the said recesses being joined by longitudinal recesses extending from one annular recess tothe other between't-lie ends of the ports. The packing ring is composed of two seiniannular portions each having two half rings joined at the middle 'by transverse pieces which are adapted to be fitted in the longitudinal recesses, while the semi-annular portions lie in the annular recesses. To complete the packing, Iiitilize two annular rings adapted substantially to fit the annular reces'seQ the said rings being cut away so as to reciive at their outer surfaces the semi-annular rings, the comppund annular ring port-ions t'huswfornied substantially lilling the recesses. The said annular rings may be arranged so that the openings at the endsthereof will lie above and below the Specification of Letters Patent.

Application led .Tune 6,

Ptented Feb. 3, 1914s. i912. seriaiNo. 702,067. Y

spaces between the ports at opposite sides of the cylinder, respectively," where the semi-annular rings are unbroken, so that no two joints will come at the same place with relation to the ports.

.The expanding pressure of the annular rings forces the semi-annular rings into engagement with the slides, and the large area of cont-act between the two affords suiticient Jfriction to prevent the annular rings from turning. The semi-annular rings are heldfrom turning through the engagement of the the longitudinal recesses, so that the entire packing, when assembled, is permanently held in th'e position desired.

Figure l is a sectional view of a construction in whichl two slide valves are located at opposite sides of the cylinder, the cylinder being shown as provided with a ring einbodying this invention, a portion of the ring being broken and shown in section; Fig. 2 is a vertical section through the cylinder, ring and valves; Fig. 3 isa view of the ring assembled and standing in the position shown in Figs.v l and 2; Fig. 4 is a similar view of the ring` assembled, but turned one quarter around; and Figs. v5 and 6 are vertical sectional views showing the several parts of the ring separated and respectively in the position shown in said Figs. 3v and 4.

The invention is shown as embodied in an engine of the type set forth in a prior ap- Yo.y 637,508, in which the cylinder is stationary and provided with two lateral ports at opposite sides, there being separate slide valves at opposite sides of the cylinder adapted by longitudinal movements to open and close said ports. It is obvious, however, that so far as relates to the construction of the packing ring, the `type of engine Ais inin'iaterial, since the ring can be used in any case where packing is required entirely around a. port through a cylindrical member. whether movable or stationary, adapted to be controlled by a valve concentric with the cylindrical surface, and movable withv relation thereto to open and'close the ports.

Referring to Fig. l, the cylinder 1v is shown as provided with the lateral ports Q and 3 ffvliichare cut through the walls of the cylinder atopposite sides and adapted to be controlled nby concentric sliding members 4 and 5 which have port openings 6 `plication tiled by me July 8, 1911, Serial longitudinal partsy thereof with the walls of sol and 7 and are adapted to fit over and be moved longitudinally with relation to the outside of the cylinder 1. In such a construction, it is necessary that the spaces at opposite sides of the ports, as well Ias the spaces between the ends of the ports, should be tightly closed to prevent the escape of the gases, and in accordance with the invention, these spaces are packed by means of an expandingring which consists of two semiannular portions each of which extends half ay around the cylinder, and two annular .,x-'rtions each of which extends wholly around the cylinder, the said annular portions 8 and 9 being substantially the same in structure as the ordinary piston ring, and' adapted to be spread and sprung into place in the annular recesses 10 and 12 formed in the outside of the cylinder.

The .two semi-annular ring portions are each provided with .two half rings, 13 and 14, each ofwhich extends half way around the cylinder to enter the annular recesses 10 and 12 above and below the ports 2 and 3, the said half rings being-connected by means of longitudinal parts 15 ada ted, re-` spectively, to ft and enter longitu inal recesses 16 and 17 which are located at opposite sides of the cylinder between .the ports 2 and 3, so that when these rings ar.;v4 in place they are locked in position. To znplete the packing, the annular rings, wl@ .ch substantially fit the annular portions of' the recess, are provided with under-cut portions 18 along their outer surfaces, adjacent to the l orts, to receive t e semi-annular rings,

'so'l t at the compoun ed rings completely fill the recess, as shown in Figs. 1 and 2.

When the cylinder and .valves are to loe assembled, the annular rings are sprung into the annular portions of the recess, preferably nular rings to expand causes all parts of the` compound ring to be pressed against the slide, thus securing an effectual packing eX- tending entirely around each port.

What I claim is:

1. A packing ring comprising two' semiannular portions each having two half rings joined by a transverse piece; combined with two complete rings fitting inside of the said halfri'ngs and adapted to expand them into contact with the part which is to be packed.

2. A cylinder having lateral ports and a slide valve controlling said ports, a packing comprising two semi-annular members each having two half rings joined at the middle by a transverse piece, said transverse pieces being adapted to lit longitudinal recesses in the cylinder wall between the vends i of the ports, and the half rings being adapted to lie in annular recesses in the cylinder wall above and below the orts; combined with two complete rings adapted to lie in said annular recesses under the half rings, substantially as and for the purpose described;

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

MARGARET E. KNIGHT.` Witnesses:

LYNETTE. CLARK, JOHN H. TEMPLE. 

